73 Chevy v8 question

[Don.F.Broadus at ucm.com]

The Dist is a 1968 built march 19 if it is points
The carb is a 1973 part   
The block could be a four bolt the last 3 numbers 010 of the block casting
number
usually indicate 4 bolt but not always. Most 4 bolts have the  large solid
balancer.

> -----Original Message-----
> From:	Stowe, Ted-SEA [SMTP:StowT at PerkinsCoie.com]
> Sent:	Saturday, April 03, 1999 10:48 AM
> To:	'diy_efi at esl.eng.ohio-state.edu'
> Subject:	73 Chevy v8 question
> 
> 
> Thanks very much to everyone for helping me id my Chevy 350.
> 
> I believe it to be a '73 350 out of a passenger car, which one I can't
> tell,
> I am assuming a 2 bolt main. whether it was rebuilt or not I can't tell.
> 
> the head casting # is 3973487
> the carb id, (2bl Rochester ) is 7043114
> the block id is 3970010
> the intake is 3997773
> 
> the distributor I can't find listed anywhere, it is a 1111440  8c19, the
> 8c19 would normally tell me that the distributor was built on march 19th
> 1978, but how that got there I can't tell. It is a single point dist.
> 
> I cannot get the waterpump nor the exhaust manifold numbers.
> 
> a great numbers book is 'Chevrolet by the numbers' really nice for this
> sort
> of thing.
> 
> I have a question about the intake manifold, this is not a efi question, I
> wish it was but I am trying to do the right thing here. Putting an efi
> system on my mgb has taught me to pay lots attention to details and think
> before doing anything.
> 
> I took the carb off and sent it out to be rebuilt, as it idled funny +,-
> 300+ rpm, and I took the intake manifold off and had it tanked because it
> was just too dirty.
> 
> I did this also because the egr valve appeared not to work, and after
> seeing
> the egr valve passages from the outside all clogged, I just thought that
> was
> the problem.
> 
> now with a clean manifold I think I see something else. this 'egr'
> manifold,
> has two small ports on the passenger side, that would appear to mate with
> 2
> ports on the head on that side. these ports are right under the egr valve
> on
> that side.
> 
> however there are no ports on either head for such a purpose, and no holes
> in the old intake manifold gaskets either. so even with the intake's egr
> ports cleaned up, nothing is going to happen. 
> 
> so is this a clear case of a different set of heads/manifold ? or is this
> not a problem ?
> does anyone sell an egr valve block off plate ? I'd hate to kind of leave
> this condition existing as the egr passages are just going to load up with
> carbon again.
> 
> also, in looking at the HP ratings for 350's around that time, (73), what
> happened to the HP ratings ? this engine would appear to have a hp rating
> of
> 145. the 350's prior seemed to have about 25+ more, was this a different
> method of measuring hp ? or was this the result of the emission
> requirements
> at the time ??
> 
> I accidentally got a set of felpro intake manifold gaskets that appear to
> be
> for a intake manifold that blocks off the exhaust crossover. I would guess
> that this was done to help cold running conditions, any advice on
> retaining
> this or not ? 
> 
> thanks for all you're help. when finances and time permits I would just
> love
> to efi this.
> this is a 350 in a 72 xj6 with a turbo 350, I plan to put a 4 speed auto
> in
> it sometime.
> 
> Ted Stowe